Plusnet on Samsung Galaxy 4G watch

[#1]

The Samsung Galaxy 4G watch works with EE.

Will it work with Plusnet that piggy-backs on EE.

[#2]

It uses an eSIM does it not?

In which case no. Plusnet doesn't support eSIMs

[#3]

PN Sims run on the EE network, any device locked to EE network should work as it is one of the same.

[#4]

Should sounds logical, but will it?

It could still be turned off to Plusnet.

Does anyone know 100%?

[#5]

PN does indeed run on the EE network, but if you want to use EE services then you need to sign up with EE.

There's several other providers who run on the EE network, but it doesn't mean that you get access to all of EE's services at cheaper prices.